Indoor and outdoor Wireless Camera pan/tilt platform and controllers

The joystick is moved forward or backward, left or right corresponding to the vertical (tilt) and horizontal (pan) movements of the camera/lens unit. Likewise, the thumb trackball is moved using the thumb to initiate pan and tilt. For the disk, touch-pad, and four-button design, left and right initiate panning, and top and bottom initiate tilt. The security officer watches the Wireless Home Monitor and can point the Wireless Camera to view any area within the pan/tilt rotation range. The platform and camera move in accordance with the control signal sent by the control unit. Pan/tilt platforms are available in a wide range of sizes from lightweight, pan-only units (scanners) for indoor applications to heavy-duty, environmentally protected pan/tilts for outdoor applications. Rugged outdoor units are environmentally enclosed and intended to withstand severe conditions of temperature, precipitation, dust, humidity, and high winds.

In the late 1990s the requirement for faster, more compact, and discreet PTZ surveillance cameras surfaced from casino, retail store, warehouse, and other applications. This resulted in the development of the high-speed video-dome camera system. The technology that made this innovation possible was the availability of small, high resolution, high sensitivity CCD camera sensors and associated DSP electronics. This, in turn, permitted the use of smaller zoom lenses. The Sony and Hitachi companies then developed the core component of the highspeed dome camera: a unitized digital pan/tilt drive package surrounding the miniature camera/lens assembly.

There are three primary applications for pan/tilt units:

(1) monitoring a fixed or point site, (2) monitoring an area site, and (3) monitoring a volume site.

A point site might correspond to a bank teller, where the area of interest is the teller and customer, and the business transaction. An area site might be a building lobby where the activity in the lobby is of interest. A volume site might be a warehouse where many vertical bays (levels) must be under surveillance at different times. For the fixed or point site, a single fixed camera and lens are suitable to view the entire area. In the area and volume cases, a single fixed camera cannot see the entire area of interest, so a panning and tilting camera and a zoom lens are required.

Applications that use pan/tilt mechanisms can be roughly classified into indoor and outdoor types, mounted in either an overt configuration—without a concealing dome or housing—or a covert application, where the pan/tilt mechanism and lens/camera unit are hidden in a dome, hidden behind some visually opaque window, or camouflaged by some other means. A common type used in indoor applications consists of a panning platform that rotates the camera via direct operator control or automatically pans from side to side to cover the specific area. A second type is the pan/tilt unit in which panning and tilting are done manually (under operator control) or automatically. Both types can be augmented with a remotely controlled zoom lens to change the FOV and therefore the instantaneous camera coverage within the full range of the scanner or pan/tilt unit. In outdoor applications, the pan/tilt mechanism and the housing containing the camera/lens must be designed to withstand wind loading, precipitation, dust, dirt, and all types of vandalism.

In an outdoor application there are two options:

(1) the lens and camera can be enclosed in an environmentally shielded housing and mounted on an environmental outdoor pan/tilt mechanism or

(2) the lens, camera, and indoor pan/tilt mechanism can be installed in an environmentally enclosed housing or dome. The advantages and disadvantages of these two techniques are discussed.

Complete integrated Wireless Security Camera System /lens/pan/tilt/ housing systems have been introduced, in which all these parts are integrated into a custom housing or dome. Typical systems are discussed in the following sections. In a parking lot or building exterior, pan/tilt lens/ camera systems are mounted on a pedestal or on a wall or ceiling, with mounting brackets. For covert applications, all pan/tilt and zoom camera/lens hardware is hidden behind a wall or ceiling. The transmission of the video signal and the control of pan/tilt mechanism movement and lens function are accomplished through separate video and control cables or through a multiplexed communication channel where the video signal and the controls are combined on a single coaxial cable or UTP, thereby eliminating additional wiring.

Scene coverage required

The intelligence the security guard obtains from the monitor picture is only as good as the information the camera/ lens combination sees. It is therefore important to determine the viewing requirements of each camera/lens and select the optimum combination for transmitting maximum intelligence to the operator. The video system designer must decide whether a camera will be mounted on a fixed mount (pointed in only one direction), or on a pan, tilt, or pan/tilt platform so that the camera can be pointed in any direction.

A good analogy is the seeing ability of a human: when we look in a single direction, we see all of the activity in that direction all of the time. When we move our eyes or head in another direction within a large FOV, we cannot see the entire scene at one time, and therefore cannot see all of the activity in the entire FOV that our eyes can see. The 3G Wi-Fi Camera in essence time shares the viewing of the scene, spending a fraction of time looking at any particular portion of the total scene area. In order to analyze this viewing requirement, video applications are divided into three types: point, area, and volume.

Point Scenes

A typical security surveillance point scene might be a supermarket checkout line, where the information of interest is the merchandise being rung up, the amount displayed on the cash register, the cashier, and the customer; or the scene might be a bank teller station, where the crucial intelligence is the identity of the customer. In such scenes, all of the activity occurs in a relatively small part of the FOV. Although a single camera with an FFL lens may be satisfactory, a better solution might be a fixed two-lens, one-camera system, with one lens viewing the amount rung up on the cash register and the other viewing the cashier, customer, and merchandise. Another solution is a zoom lens with some panning and tilting motion. This would be necessary in a jewelry or department store where the counter area is viewed with a wide-angle lens and a small piece of jewelry is viewed with a narrow-angle lens. The pan/tilt is necessary with a zoom lens because the high-magnification (telephoto) position results in a very small FOV, so the camera must be pointed at the exact center of the target.

In the wide-field scene, the article of interest is not normally centered in the FOV. In this situation, the operator must redirect the 3G Wi-Fi Camera /lens combination via the pan/tilt control to center the object of interest and make it observable in the high-magnification position

More information about Wireless Security Cameras at http://www.jimilab.com/tutorial/ .

Why Should You Use a Good Quality Dental Compressor

Like other dental tools you use, not all dental air compressors are created equal. There are a variety of capacity and power options, plus materials and layout that can make or break a system for your dental office. We’ve looked at some of the chief points for selecting the right air compressor and what requirements you should be aware of when you make your choice.

Oil-less compressors tend to generate higher heat outputs and have a greater possibility of creating condensation, so they need plenty of room to vent and have air circulate around them. This is typically good news, because it means there is usually enough space to install silencers and covers which can reduce noise, while ensuring the proper breathing room for a full-functioning air compressor.

Sound covers and exhaust/vent silencers tend to come with their own warranty, so working with a reputable dealer can ensure your equipment is properly installed, maintained, and protected for its useful life.

You should also look at the construction of the unit itself. Ask your air compressor dealer about improvements to intake filters to reduce noise, the inclusion of rubber shock mounts and flatter frame options that can keep things steady and quiet during even extended operations.

When you’re using a poor-quality air compressor system that delivers either dirty air or an air compressor that delivers air at a lower pressure than required, you’ll see low-quality or even no operation of these devices. If air pressure is good, but the air itself is unclean, then you’re risking internal damage to those units, reducing their overall lifespan.

The cleaner the air your compressor creates and uses, the safer your patients. In a dental practice, there is the risk of exposure to bacteria, microorganisms and pathogens. When equipment is producing poor-quality air, or it’s improperly generating a moist environment in machine parts, you could be creating a breeding ground for these dangers.

The future of Wireless Security Camera System technology

I don’t know about you, but most people would jump at the chance to automate more things in their lives if doing so were affordable and could be achieved with reasonably minimal effort. Well, you’re in luck. Most of us are able to automate at least certain aspects of home life today because they don’t cost an arm or a leg, and they aren’t difficult to install. This blog focuses on how you can simply and relatively inexpensively control many of your daily tasks. Not only that, most of what I cover can be handled remotely, meaning you don’t even have to be at home to do this awesome stuff.

Today, all you need to implement a home automation system is an Internet connection and (in some cases, but not all) a device to control it, such as a smartphone, table, or computer. Of course, you have to purchase a system or appliances, but many of them that utilize your Wi-Fi network (or even your home’s power lines) are inexpensive. Another bonus with today’s home automation technology is that you can start as small as you like and build up to as large as you like. For example, with a kit such as the WeMo Switch + Motion kit from Belkin, you can begin with just a smart wall outlet and a motion detector, but can add more and more WeMo devices to your heart’s content.

Benefitting from [url=http://www.jimilab.com/products/jh08-wireless-home-monitor.html]Wireless Camera[/url]

The idea of home automation is really cool and futuristic, but if that’s your only motivation to automate the things in your home, you just might be missing the forest for the trees. Sure, you can impress friends by turning on your fireplace with a tap of your iPhone, but benefits of home automation go way beyond bragging rights.

Convenience is key!

Convenience is indeed the key; otherwise, what’s truly the point? The words “home” and “automation” fit together perfectly to describe how to get things done easier, better, and faster than ever before, which equates to convenience. Want a few examples of how today’s home automation is convenient? Okay, here you go:

✓ Your teenage son calls from a friend’s cellphone and tells you he’s locked his keys and everything else he owns in the car you let him borrow. This kid is 30 minutes away — not good. Suddenly you remember you had installed a device in your car that enables you to unlock it (and even start it) from a million miles away with your smartphone. A few taps and swipes on your phone, and your son is back in the car. Convenience.

[url=http://www.jimilab.com/products/wireless-home-monitor.html]Home Security Cameras[/url]

✓ The lawn needs mowing before company arrives this weekend, but you’ve been in meetings all week on the other side of the country, and now you’re stuck in the airport. Whip out your Android phone, open your robotic lawn mower’s app, and tell it to get to work. The lawn’s done before your plane even lands. Convenience.

✓ You and the family are singing “Let It Go” of Frozen fame for the 100th time on your road trip to Disney World when it dawns on you (three hours away from home) that you left the lights on and an electric heater running in the bathroom. You calmly fire up your iOS tablet, open the app for your home automation system, and turn off the lights and the outlet the heater is plugged in to. Dare I use the “C” word again? You bet I do. Convenience.

Wireless Home Cameras


Fewer things in life are more appreciated than security — in this case, knowing (or at least feeling) that you’re more safe doing things a certain way or using certain devices. Today’s Internet-based home automation technology gives one just that kind of security. Sure, home security companies have been in existence for decades now, and they are great at what they do. People also have had personal means of protection that usually work as intended, provided they’re used properly. Wireless Security Cameras have also been providing more home security for some time, although they typically were expensive to install. With today’s tech,however, you can secure your home in myriad ways you never were able to before:

✓ [url=http://www.jimilab.com/products/jh09-3g-home-monitor.html]3G Wi-Fi Camera[/url] provide a look into your home from anywhere you have an Internet connection.

✓ Motion detectors keep you privy to any activity in your home.

✓ Smart locks and security apps allow you to lock and unlock your doors, no matter whether you’re home or visiting family halfway around the globe.

✓ When coupled with the use of door and window sensors, apps can alert you via text or email when someone enters your home uninvited.

✓ You can control lighting within your home from anywhere you have a connection to the Internet, making it appear to folks outside that someone is home. And these are just some of the things that Internet-enabled home automation systems and devices can do to help raise your level of personal and family security.

Další stránka »